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CryptoAPIDecryptor (POI API Documentation)
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org.apache.poi.poifs.crypt.cryptoapi</FONT>
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Class CryptoAPIDecryptor</H2>
<PRE>
java.lang.Object
  <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html" title="class in org.apache.poi.poifs.crypt">org.apache.poi.poifs.crypt.Decryptor</A>
      <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.poi.poifs.crypt.cryptoapi.CryptoAPIDecryptor</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>CryptoAPIDecryptor</B><DT>extends <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html" title="class in org.apache.poi.poifs.crypt">Decryptor</A></DL>
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<B>Field Summary</B></FONT></TH>
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&nbsp;<A NAME="fields_inherited_from_class_org.apache.poi.poifs.crypt.Decryptor"><!-- --></A>
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<TH ALIGN="left"><B>Fields inherited from class org.apache.poi.poifs.crypt.<A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html" title="class in org.apache.poi.poifs.crypt">Decryptor</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#builder">builder</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#DEFAULT_PASSWORD">DEFAULT_PASSWORD</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#DEFAULT_POIFS_ENTRY">DEFAULT_POIFS_ENTRY</A></CODE></TD>
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<CODE>protected </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#CryptoAPIDecryptor(org.apache.poi.poifs.crypt.cryptoapi.CryptoAPIEncryptionInfoBuilder)">CryptoAPIDecryptor</A></B>(<A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIEncryptionInfoBuilder.html" title="class in org.apache.poi.poifs.crypt.cryptoapi">CryptoAPIEncryptionInfoBuilder</A>&nbsp;builder)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected static&nbsp;javax.crypto.SecretKey</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#generateSecretKey(java.lang.String, org.apache.poi.poifs.crypt.EncryptionVerifier)">generateSecretKey</A></B>(java.lang.String&nbsp;password,
                  <A HREF="../../../../../../org/apache/poi/poifs/crypt/EncryptionVerifier.html" title="class in org.apache.poi.poifs.crypt">EncryptionVerifier</A>&nbsp;ver)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>&nbsp;java.io.InputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)">getDataStream</A></B>(<A HREF="../../../../../../org/apache/poi/poifs/filesystem/DirectoryNode.html" title="class in org.apache.poi.poifs.filesystem">DirectoryNode</A>&nbsp;dir)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Decrypt the Document-/SummaryInformation and other optionally streams.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;long</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#getLength()">getLength</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the length of the encrypted data that can be safely read with
 <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)"><CODE>Decryptor.getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)</CODE></A>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;javax.crypto.Cipher</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#initCipherForBlock(javax.crypto.Cipher, int)">initCipherForBlock</A></B>(javax.crypto.Cipher&nbsp;cipher,
                   int&nbsp;block)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Initializes a cipher object for a given block index for decryption</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected static&nbsp;javax.crypto.Cipher</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#initCipherForBlock(javax.crypto.Cipher, int, org.apache.poi.poifs.crypt.EncryptionInfoBuilder, javax.crypto.SecretKey, int)">initCipherForBlock</A></B>(javax.crypto.Cipher&nbsp;cipher,
                   int&nbsp;block,
                   <A HREF="../../../../../../org/apache/poi/poifs/crypt/EncryptionInfoBuilder.html" title="interface in org.apache.poi.poifs.crypt">EncryptionInfoBuilder</A>&nbsp;builder,
                   javax.crypto.SecretKey&nbsp;skey,
                   int&nbsp;encryptMode)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#verifyPassword(java.lang.String)">verifyPassword</A></B>(java.lang.String&nbsp;password)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
</TABLE>
&nbsp;<A NAME="methods_inherited_from_class_org.apache.poi.poifs.crypt.Decryptor"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class org.apache.poi.poifs.crypt.<A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html" title="class in org.apache.poi.poifs.crypt">Decryptor</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getBlockSizeInBytes()">getBlockSizeInBytes</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getDataStream(org.apache.poi.poifs.filesystem.NPOIFSFileSystem)">getDataStream</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getDataStream(org.apache.poi.poifs.filesystem.OPOIFSFileSystem)">getDataStream</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getDataStream(org.apache.poi.poifs.filesystem.POIFSFileSystem)">getDataStream</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getInstance(org.apache.poi.poifs.crypt.EncryptionInfo)">getInstance</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getIntegrityHmacKey()">getIntegrityHmacKey</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getIntegrityHmacValue()">getIntegrityHmacValue</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getKeySizeInBytes()">getKeySizeInBytes</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getSecretKey()">getSecretKey</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getVerifier()">getVerifier</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#setIntegrityHmacKey(byte[])">setIntegrityHmacKey</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#setIntegrityHmacValue(byte[])">setIntegrityHmacValue</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#setSecretKey(javax.crypto.SecretKey)">setSecretKey</A>, <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#setVerifier(byte[])">setVerifier</A></CODE></TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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&nbsp;
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<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<A NAME="CryptoAPIDecryptor(org.apache.poi.poifs.crypt.cryptoapi.CryptoAPIEncryptionInfoBuilder)"><!-- --></A><H3>
CryptoAPIDecryptor</H3>
<PRE>
protected <B>CryptoAPIDecryptor</B>(<A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIEncryptionInfoBuilder.html" title="class in org.apache.poi.poifs.crypt.cryptoapi">CryptoAPIEncryptionInfoBuilder</A>&nbsp;builder)</PRE>
<DL>
</DL>

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<A NAME="verifyPassword(java.lang.String)"><!-- --></A><H3>
verifyPassword</H3>
<PRE>
public boolean <B>verifyPassword</B>(java.lang.String&nbsp;password)</PRE>
<DL>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#verifyPassword(java.lang.String)">verifyPassword</A></CODE> in class <CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html" title="class in org.apache.poi.poifs.crypt">Decryptor</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="initCipherForBlock(javax.crypto.Cipher, int)"><!-- --></A><H3>
initCipherForBlock</H3>
<PRE>
public javax.crypto.Cipher <B>initCipherForBlock</B>(javax.crypto.Cipher&nbsp;cipher,
                                              int&nbsp;block)
                                       throws java.security.GeneralSecurityException</PRE>
<DL>
<DD>Initializes a cipher object for a given block index for decryption
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>cipher</CODE> - may be null, otherwise the given instance is reset to the new block index<DD><CODE>block</CODE> - the block index, e.g. the persist/slide id (hslf)
<DT><B>Returns:</B><DD>a new cipher object, if cipher was null, otherwise the reinitialized cipher
<DT><B>Throws:</B>
<DD><CODE>java.security.GeneralSecurityException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="initCipherForBlock(javax.crypto.Cipher, int, org.apache.poi.poifs.crypt.EncryptionInfoBuilder, javax.crypto.SecretKey, int)"><!-- --></A><H3>
initCipherForBlock</H3>
<PRE>
protected static javax.crypto.Cipher <B>initCipherForBlock</B>(javax.crypto.Cipher&nbsp;cipher,
                                                        int&nbsp;block,
                                                        <A HREF="../../../../../../org/apache/poi/poifs/crypt/EncryptionInfoBuilder.html" title="interface in org.apache.poi.poifs.crypt">EncryptionInfoBuilder</A>&nbsp;builder,
                                                        javax.crypto.SecretKey&nbsp;skey,
                                                        int&nbsp;encryptMode)
                                                 throws java.security.GeneralSecurityException</PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE>java.security.GeneralSecurityException</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="generateSecretKey(java.lang.String, org.apache.poi.poifs.crypt.EncryptionVerifier)"><!-- --></A><H3>
generateSecretKey</H3>
<PRE>
protected static javax.crypto.SecretKey <B>generateSecretKey</B>(java.lang.String&nbsp;password,
                                                          <A HREF="../../../../../../org/apache/poi/poifs/crypt/EncryptionVerifier.html" title="class in org.apache.poi.poifs.crypt">EncryptionVerifier</A>&nbsp;ver)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)"><!-- --></A><H3>
getDataStream</H3>
<PRE>
public java.io.InputStream <B>getDataStream</B>(<A HREF="../../../../../../org/apache/poi/poifs/filesystem/DirectoryNode.html" title="class in org.apache.poi.poifs.filesystem">DirectoryNode</A>&nbsp;dir)
                                  throws java.io.IOException,
                                         java.security.GeneralSecurityException</PRE>
<DL>
<DD>Decrypt the Document-/SummaryInformation and other optionally streams.
 Opposed to other crypto modes, cryptoapi is record based and can't be used
 to stream-decrypt a whole file
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)">getDataStream</A></CODE> in class <CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html" title="class in org.apache.poi.poifs.crypt">Decryptor</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>dir</CODE> - the node to read from
<DT><B>Returns:</B><DD>decrypted stream
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE>
<DD><CODE>java.security.GeneralSecurityException</CODE><DT><B>See Also:</B><DD><a href="http://msdn.microsoft.com/en-us/library/dd943321(v=office.12).aspx">2.3.5.4 RC4 CryptoAPI Encrypted Summary Stream</a></DL>
</DD>
</DL>
<HR>

<A NAME="getLength()"><!-- --></A><H3>
getLength</H3>
<PRE>
public long <B>getLength</B>()</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getLength()">Decryptor</A></CODE></B></DD>
<DD>Returns the length of the encrypted data that can be safely read with
 <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)"><CODE>Decryptor.getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)</CODE></A>.
 Just reading to the end of the input stream is not sufficient because there are
 normally padding bytes that must be discarded

 <p>
    The length variable is initialized in <A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)"><CODE>Decryptor.getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)</CODE></A>,
    an attempt to call getLength() prior to getDataStream() will result in IllegalStateException.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html#getLength()">getLength</A></CODE> in class <CODE><A HREF="../../../../../../org/apache/poi/poifs/crypt/Decryptor.html" title="class in org.apache.poi.poifs.crypt">Decryptor</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the length of the stream returned by <A HREF="../../../../../../org/apache/poi/poifs/crypt/cryptoapi/CryptoAPIDecryptor.html#getDataStream(org.apache.poi.poifs.filesystem.DirectoryNode)"><CODE>getDataStream(DirectoryNode)</CODE></A></DL>
</DD>
</DL>
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